/Engine/Source/Runtime/RHI/Public/GPUDefragAllocator.h
Performs a partial defrag while trying to process any pending async reallocation requests.
[FMemoryChunk](API\Runtime\RHI\FGPUDefragAllocator\FMemoryChunk) * RelocateAllowed ( [FMemoryChunk](API\Runtime\RHI\FGPUDefragAllocator\FMemoryChunk) * FreeChunk, [FMemoryChunk](API\Runtime\RHI\FGPUDefragAllocator\FMemoryChunk) * UsedChunk )